§
Luxuse
Patent Intelligence
Sign In
← Back to Patent Explorer
EP0253677A1 Expired / Lapsed EP ⏱️ 0.0 years remaining

High-frequency heating device and method of operating this device

Assignee: Olympus Corp
•
Filing: 1987-07-17
•
Granted: —
•
Expires: 2007-07-17
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

Abstract A high-frequency heating method of supplying a high-frequency current between a first electrode (ll) which is disposed to the inside of a first electrode structure (4) so constituted as to be disposed in the vicinity of a portion intended to be heated (2) and which is surrounded with a flexible and gastight bag-like member (l2) and a second electrode (44) disposed to the inside of a second electrode structure (5) so constituted as to be disposed on the outer circumference of a living body (l) and having an electrode area greater by 5 times or more than the first electrode (ll), thereby forming a more intense electric field distribution in the vicinity of the first electrode structure (4) and selectively heating the portion intended to be heated at the periphery of the first electrode structure (4), wherein a coolant at a temperature of 37°C to 43°C which has physical properties approximate to those of the living body tissues at a portion where the first electrode structure (4) is disposed is supplied and discharged to and from the inside of the bag-like member (l2), and the coolant is circulated by l to l5 times a volume of the inner volume of the bag-like member (l2) per minute on the side of the first electrode structure (4).

Inventors

  • 👤 Akira Sogawa
  • 👤 Tadashi Onuma
  • 👤 Atsuhi Yoshihara
  • 👤 Kiyoshi Kitagawa
  • 👤 Chikau Onodera

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-10-23 04:30
CPC Classifications
A; A61; A61N; A61N1/00; A61N1/40; A61N1/403; A61N1/02; A61N1/04; A61N1/06

Claims Analysis

Total Claims: 5
Claim 1
Independent Claim 211 words
A high-frequeny heating device comprising a first electrode structure so adapted as to be disposed to the vicinity of a portion intended to be heated, and having a first electrode, a first flexible and gastight bag-like member surrounding said first electrode and a mechanism for supplying and discharging the coolant to and from an inside of said the first bag-like member; a second electrode structure so adapted as to be disposed on the outer circumference of a living body and as to selectively heat said portion at the periphery of said first electrode structure in cooperation with said first electrode, and having a second electrode with an electrode area greater by 5 times or more than the area of said first electrode; a high-frequency power source connected to both of said first electrode and said second electrode for supplying an electric current to both of said electrodes; and means for controlling a temperature and flow rate of the coolant, wherein the coolant has physical properties approximate to those of the living body tissues at a portion where the first electrode structure is disposed and the circulation amount/min of the coolant to the first electrode structure is from l to l5 times volume of an inner volume of said first bag-like member.
Claim 2
Dependent Claim 211 words
A high-frequeny heating device comprising a first electrode structure so adapted as to be disposed to the vicinity of a portion intended to be heated, and having a first electrode, a first flexible and gastight bag-like member surrounding said first electrode and a mechanism for supplying and discharging the coolant to and from an inside of said the first bag-like member; a second electrode structure so adapted as to be disposed on the outer circumference of a living body and as to selectively heat said portion at the periphery of said first electrode structure in cooperation with said first electrode, and having a second electrode with an electrode area greater by 5 times or more than the area of said first electrode; a high-frequency power source connected to both of said first electrode and said second electrode for supplying an electric current to both of said electrodes; and means for controlling a temperature and flow rate of the coolant, wherein the coolant has physical properties approximate to those of the living body tissues at a portion where the first electrode structure is disposed and the circulation amount/min of the coolant to the first electrode structure is from l to l5 times volume of an inner volume of said first bag-like member.
Claim 3
Independent Claim 37 words
A device according to claim l including a flexible and gastight second bag-like member surrounding said second electrode and a mechanism for supplying and discharging a coolant to and from an inside of said second bag-like member.
Claim 4
Independent Claim 31 words
A device as defined in claim l or 2, wherein the coolant is an aqueous solution of an inorganic salt at a concentration from l5 m mol/l to l60 m mol/l.
Claim 5
Dependent Claim 36 words
A device as defined in claim 3, wherein the specific heat of the coolant is substantially equal with the specific heat of the living body tissue at a portion where the first electrode structure is disposed.

References Cited (Backward Citations)

DE2407559B2 Cited
EP0139433A1 Cited

USPTO Annuity & Maintenance Windows

Maintenance schedule is calculated for granted US utility patents.

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag